Swift UIUserInterfaceIdiom 错误

Question

我只在 iphone 5/6/6 Plus/iPad Mini/iPad 的横屏模式下使用 View ，现在我想在我的应用程序中集成 UIUserInterfaceIdiom 以在横屏模式下使用这些设备。

func openGallary()
{
    picker!.sourceType = UIImagePickerControllerSourceType.PhotoLibrary
    if UIDevice.currentDevice().userInterfaceIdiom == .Phone
 {
        self.presentViewController(picker!, animated: true, completion: nil)
   }
    else
   {
        popover=UIPopoverController(contentViewController: picker!)
      popover!.presentPopoverFromRect(btnClickMe.frame, inView: self.view, permittedArrowDirections: UIPopoverArrowDirection.Any, animated: true)
  }
}

我正在尝试使用这段代码，但出现错误 UIUserInterfaceIdiomPad

Answer 1

你必须这样做:

if UIDevice.currentDevice().userInterfaceIdiom == UIUserInterfaceIdiom.Phone {
    // .....    
}

您还可以创建一个只读的计算属性来返回检查它，如下所示:

var iPhone: Bool {
    return UIDevice.currentDevice().userInterfaceIdiom == UIUserInterfaceIdiom.Phone
}

//

var iPad: Bool {
    return UIDevice.currentDevice().userInterfaceIdiom == UIUserInterfaceIdiom.Pad
}

//

if iPhone {
        presentViewController(picker!, animated: true, completion: nil)
} else if iPad {
       popover=UIPopoverController(contentViewController: picker!)
       popover!.presentPopoverFromRect(btnClickMe.frame, inView: self.view, permittedArrowDirections: UIPopoverArrowDirection.Any, animated: true)
} else {
    println("Unspecified")
}